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Patent US3504429A successfully refreshed from Google Patents.
US3504429A
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Method of preparing unrefined copper electrodes
Assignee: British Copper Refiners Ltd
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Filing: 1966-02-01
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Granted: 1970-04-07
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Expires: 1986-02-01
Abstract
No abstract record available.
Inventors
- 👤 William Richard Nobl Snelgrove
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:55
CPC Classifications
C; C25; C25C; C25C1/00; C25C1/12; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49789; Y10T29/49798; Y10T29/4998; Y10T29/49988; Y10T29/49989
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2023424A
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US2195809A
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US2421209A
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US2556635A
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US2947075A
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US3038250A
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US3066401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-06 | 1973-10-06 | 1974-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-06 | 1977-10-06 | 1978-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-06 | 1981-10-06 | 1982-04-07 | $7700.00 | Window Closed / Lapsed |